Slide-valve engine.



"W. CAREY.

SLIDE VALVE ENGINE. APPLICATION FILED NOV. 20, 1911 Patented Mar.18,1913.

. the inlet and exhaust of UNITED STATES PATENT OFFICE.

WILLIAM L. CAREY, OF LARIMORE, NORTH DAKOTA.

SLIDE-VALVE ENGINE.

To all whom it may concern: x l

e it known that I, VILLIAM L. CAREY, citizen of the United States of America, and resident of Larimore, Grand Forks" county, North Dakota, have invented a new and useful Slide-Valve Engine, of whichthe following is a specification.

My invention relates to reciprocating steam engines and has for its object the provision of an improved means for controlling steam to and from the steam cylinder consisting of valves slidably mounted in the two endsof the cylinder and connected together for simultaneous operatiomsaid valves being adapted to be engaged by the reciprocating piston to properly position them for the inlet and exhaust of steam during the operation of the with the parts in engine.

,My invention consists in the construction, arrangement and combination of elements hereinafter set forth, pointed out in my claims and illustrated by the accompanying drawing, in whicha j;

Figure 1 is a longitudinal sectional elevation of the device. Fig. 2 is a crosssection on the indicated line 2-2 of Fig. 1. Fig. 3 is a cross-section on the indicated line 3-3 ofFig. 1.

In the construction of the device as shown the nuiperarilt) designates a steam cylinder inwhich a piston 11 is mounted for reciprocation and provided with a piston rod 12 passing through a gland 13 in one cylinder head. A steam supply pipe 14 is 1110K. .ed parallel with and contiguous to the cylinder 10 and is formed wit-h branches 15, 16 communicating with valve ports 17, 18 .opening throu h the slideways 24. The valve to opposite end portions of said cylinder. A steam exhaust pipe 19 is mounted; parallel with? 'and contiguous to the cylinder 10.0n the opposite side thereof from the supply pipe 14 and is formed with branches 20,21 communicating with valve ports 22, 23 opening to opposite 'end portions of said cylinder. The cylinder 10 is formed with-slideways 24 in diametrically opposite sides of one end portion and slideways 25 in diamet- 'rically opposite sides of the opposite end portion. valve plug 26- of skeleton form is mounted in and adapted for-limited tralvel ug 26, is ormed with a valve port 27 adaiited to register at times with the live steam port 17' and with a valve port 28 adapted to register at other times with the exhaust port Specification of Letters Patent. Application filed November 20, 1911.

Patented Mar. 18, 1913. Serial No. 661,334.

9 are connected for simultaneous travel by rods 32, 33 fixed at their ends to said plugs and extending through longitudinal holes inthe wall of the cylinder at opposite sides of and parallel with the bore thereof.

In practical use of the device, beginning the positions shown, live steam from the pipe 14 passes through the branch 15, port 17, and port 27 to the cylinder and acts to force the piston to the opposite end ofthe cylinder, the exhaust'taking place through the port 31, 1")'i 21t 23, branch 21 and pipe 19. VVhennea'F-"ihe end of its stroke the piston 11 impacts the valve plug 29 and forces it rearwardly in the slideways 25, and'the valve plug 26 also is moved in its slideways 24 through the connecting rods 32, 33. This has the efi'ect of reversing the various valve ports, and thereafter live steam from the pipe 14 passes through 'the branch 16, port 18 and port 30 to act on and move the piston in the opposite direction,

the exhaust taking place through the port' 28, port 22, branch 20 and pipe 19. At the end of its stroke the piston 11 im iacts the valve plug 26 and again changes '%he ports to the initial positions. This openation is successively repeated while the enginv moving forwardly.

To reverse the engine I have n'ovided a reversing rod 34 35 in ahead of the cvlinder and into a seat in a cross-bar 26 of the valve plug 26. When it is desired to reverse-the engine the reversing rod 34 is actuate when the Ipiston 11 is near the middle of a stroke to t valve plugs 26, 29 before such stroke is completed. This has the effect of changing the arran ement of steam and exhaust valves and a tering the direction of the engine.

I claim as my invention- 1. In a slide valve engine, a cylinder. :1 piston reciprocally mounted in said cylinpassing throng a gland, screwed e end of changing the positions of the tier, a steam pipe having communication mounted in the bores aforesaid and engagwith said cylinder at the opposite ends ing said valves, said valves being adapted to thereof, an exhaust pipe havin communibe engaged by the piston aforesaidto adjust; I cation with said cylinder at t e opposite them. I

ends thereof and diametrically opposite the 8. In a slide valve engine, a cylinder hav steam entrances aforesaid, slideways proing steam ports adjacent to its two termivided in the ends of the cylinder communinals, and exhaust ports oppositely disposed (rating with the steam entrances and exto said steam ports, said cylinder being prohaustports, valves slidably mounted in said vided with slideways in the interior thereof slideways' and having openings adapted to and adjacent to its ends, said slideways comaline with the steam entrances and exhaust muni cating with the ports aforesaid, said ports, the valves at each end of the cylincylinder also being formed with bores ex- 40 der being connected for simultaneous movetended longitudinally thereof and connectment, and the valves at thetwo ends of the ing the slideways aforesaid in pairs, Valves cylinder. being connected for movement slidably mounted in said slideWays and prosimultaneously. vided with openings adapted to aline with 2. In a slide valve engine, a cylinder, a the ports aforesaid, the valves at the two piston slidably mounted in said cylinder, the ends of' the cylinder being connected for siends of said cylinder having ports therein. multaneous movement, and rods slidably oppositely disposed, slideways communicatmounted in the bores in the cylinder and ing with said ports, and bores extending lonconnecting the valves in the two ends of the gitudinally of the cylinder and terminating cylinder for simultaneous movement. in the Walls of said slideways, "alves slid- Signed by me at Larimore, North Dakota,

ably mounted n said slideways and having this thirteenth davy zpiglcgglertwlliREY openings therein adapted to aline with the ports aforesaid, said valves being connected Witnesses: in pairs at the ends of the cylinders for M. A. CARTER, simultaneous movement, and rods slidably y El). JOHNSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. C. 

